4. OPERATION

4.4Manual home position return mode 4.4.1 Outline of home position return

Home position return is performed to match the command coordinates with the machine coordinates. In the incremental system, home position return is required every time input power is switched on. In the absolute position detection system, once home position return is done at the time of installation, the current position is retained if power is switched off. Hence, home position return is not required when power is switched on again.

This servo amplifier has the home position return methods given in this section. Choose the most appropriate method for your machine structure and application.

This servo amplifier has the home position return automatic return function which executes home position return by making an automatic return to a proper position if the machine has stopped beyond or at the proximity dog. Manual motion by jog operation or the like is not required.

(1) Manual home position return types

Choose the optimum home position return according to the machine type, etc.

Type

Home position return method

Features

 

 

General home position return method using a

 

With deceleration started at the front end of a

proximity dog.

 

proximity dog, the position where the first

Repeatability of home position return is

Dog type home position

Z-phase signal is given past the rear end of the dog

excellent.

return

or a motion has been made over the home position

The machine is less burdened.

 

shift distance starting from the Z-phase signal is

Used when the width of the proximity dog

 

defined as a home position.(Note)

can be set greater than the deceleration

 

 

distance of the servo motor.

 

With deceleration started at the front end of a

Home position return method using a

 

proximity dog, the position where the first Z-phase

proximity dog.

Count type home

signal is given after advancement over the preset

Used when it is desired to minimize the

moving distance after the proximity dog or a motion

length of the proximity dog.

position return

has been made over the home position shift distance

 

 

 

 

starting from the Z-phase signal is defined as a

 

 

home position.

 

Data setting type home

The position reached after any automatic motion is

No proximity dog required.

position return

defined as a home position.

 

 

The position where the machine stops when its part

Since the machine part collides with the

Stopper type home

machine be fully lowered.

is pressed against a machine stopper is defined as a

position return

The machine and stopper strength must be

home position.

 

increased.

 

 

Home position ignorance

The position where servo is switched on is defined as

 

(Servo-on position as

a home position.

 

home position)

 

 

 

 

The position where the axis, which had started

The Z-phase signal is not needed.

Dog type rear end

decelerating at the front end of a proximity dog, has

 

moved the after-proximity dog moving distance and

 

reference

 

home position shift distance after it passed the rear

 

 

 

 

end is defined as a home position.

 

 

The position where the axis, which had started

The Z-phase signal is not needed.

Count type front end

decelerating at the front end of a proximity dog, has

 

moved the after-proximity dog moving distance and

 

reference

 

home position shift distance is defined as a home

 

 

 

 

position.

 

 

The position where the first Z-phase signal is issued

 

Dog cradle type

after detection of the proximity dog front end is

 

 

defined as a home position.

 

Note: The Z-phase signal is a signal recognized in the servo amplifier once per servo motor revolution and cannot be used as an output signal.

4 - 31

Page 114
Image 114
Mitsubishi Electronics MR-J2S- CL specifications Manual home position return types, Length of the proximity dog

MR-J2S- CL specifications

Mitsubishi Electronics has long been a pioneer in automation and control technology, and one of its prominent offerings is the MR-J2S-CL servo amplifier. Designed to enhance the performance of servo motors, the MR-J2S-CL is a critical component in various applications, ranging from industrial machinery to robotics.

One of the standout features of the MR-J2S-CL is its high-performance control capabilities. This servo amplifier supports both position and speed control, enabling precise movement and responsiveness in dynamic applications. The MR-J2S-CL boasts a sophisticated control algorithm that ensures superior torque response, making it ideal for applications that require quick and accurate motion control.

The MR-J2S-CL employs advanced features such as the Auto-Tuning function, which automatically adjusts the servo settings to optimize performance for the specific load conditions. This automation simplifies setup processes and reduces downtime, allowing users to quickly configure the system to their needs.

In terms of connectivity, the MR-J2S-CL is equipped with various communication options, including the CC-Link and Mitsubishi's own MELSEC communications. These options facilitate seamless integration with other devices and control systems, enhancing the overall interoperability of factory automation setups.

Another critical aspect of the MR-J2S-CL is its built-in safety features. The amplifier includes functionalities like safe torque off (STO) and overcurrent protection, which contribute to the overall safety of the operation. These safety measures are essential in reducing the risk of accidents in environments where human interaction occurs alongside machinery.

The MR-J2S-CL is designed with durability and reliability in mind. It has a robust construction that is capable of withstanding harsh industrial environments, including high temperatures and dust exposure. This resilience ensures a long service life, reducing maintenance needs and operational costs.

Furthermore, the MR-J2S-CL is compatible with a wide range of Mitsubishi servo motors, making it a versatile choice for various applications. Its comprehensive capabilities, combined with user-friendly interface options, allow for easy programming and monitoring of performance.

In summary, the Mitsubishi Electronics MR-J2S-CL servo amplifier stands out for its high-performance control, advanced safety features, and robust design. It effectively meets the demands of various industrial applications, making it a valuable asset in modern automation and manufacturing environments. With its blend of precision, reliability, and flexibility, the MR-J2S-CL continues to be a preferred choice for engineers and manufacturers alike.